Stricter checks for node names.

diff --git a/src/tincctl.c b/src/tincctl.c
index 46688f3..523bbb4 100644 (file)
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -832,6 +832,11 @@ static int cmd_connect(int argc, char *argv[]) {
                return 1;
        }
 
+       if(!check_id(argv[2])) {
+               fprintf(stderr, "Invalid name for node.\n");
+               return 1;
+       }
+
        if(!connect_tincd())
                return 1;
 
@@ -850,6 +855,11 @@ static int cmd_disconnect(int argc, char *argv[]) {
                return 1;
        }
 
+       if(!check_id(argv[2])) {
+               fprintf(stderr, "Invalid name for node.\n");
+               return 1;
+       }
+
        if(!connect_tincd())
                return 1;
 
@@ -1018,6 +1028,11 @@ static int cmd_config(int argc, char *argv[]) {
                }
        }
 
+       if(node && !check_id(node)) {
+               fprintf(stderr, "Invalid name for node.\n");
+               return 1;
+       }
+
        // Open the right configuration file.
        char *filename;
        if(node)
@@ -1151,6 +1166,15 @@ static int cmd_config(int argc, char *argv[]) {
        return 0;
 }
 
+bool check_id(const char *name) {
+       for(int i = 0; i < strlen(name); i++) {
+               if(!isalnum(name[i]) && name[i] != '_')
+                       return false;
+       }
+
+       return true;
+}
+
 static int cmd_init(int argc, char *argv[]) {
        if(!access(tinc_conf, F_OK)) {
                fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
@@ -1184,11 +1208,9 @@ static int cmd_init(int argc, char *argv[]) {
                }
        }
 
-       for(int i = 0; i < strlen(name); i++) {
-               if(!isalnum(name[i]) && name[i] != '_') {
-                       fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
-                       return 1;
-               }
+       if(!check_id(name)) {
+               fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
+               return 1;
        }
 
        if(mkdir(CONFDIR, 0755) && errno != EEXIST) {